Hello again Travis, I believe 3.2 hit on an item that certainly has a lot to do with whether cracking can become an issue or not. If you have a depth-to-width ratio that is too great you could see centerline solidification cracking, similarly, if you are pushing the beads(could result in a troughed bead profile) or lacking sufficient wire speed(amp-to-volt ratios), you might see cracking. I can't recall the specific post, but there was an article included by someone on here that talked of bead profiles, it had to do with SMAW, but could have been speaking of FCAW just as readily. In the article they spoke of how the operators had run troughed profile beads and experienced cracking, by changing the bead profiles to a convex shape the cracking issues were resolved. I would imagine others on here have a better grasp of the post that I am thinking of and could steer you there to consider it. Best regards, Allan